<!DOCTYPE HTML>
<html>

<head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
  <title>document.getElementById</title>
</head>

<body>
  <p id="con">JavaScript</p>
  <script type="text/javascript">
    var mychar = document.getElementById("con");
    document.write("结果:" + mychar); //输出获取的P标签。
  </script>
</body>

</html>